How can i start reading from a child (firebase)

Hello, sorry for this noob question but i’m starting reading codes

My question is how can i start reading from “video_1, video_2 …”. I tried with this code, but just i can get the parent list (enfermedades_cardiovasculares, factores_de_riesgo, general)

om the level

Thank you

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you need to create, when firebase got tag list, then for each item in list set firebase bucket as get item and get tags, like use 2nd firebase and call that to get tags for that item, and when that get tags use them to get data.